SpaceX readies its seventh test flight of Starship, the most powerful rocket ever designed. The trial will test upgrades to the spacecraft and deploy mock satellites.

SpaceX’s giant Starship rocket is slated to launch for the seventh time on Thursday in a crucial test of its ability to carry and place satellites into orbit.

The National Reconnaissance Office launched new spy satellites into lower Earth orbit late Thursday, adding to the growing constellation of such U.S.-based intelligence-gathering satellites around the world.